Selenium 74 isotope, 500 g

I have 500 g of Selenium 74 - this is an isotope, a powerful anti-cancer agent is produced from it, it is also used in energy, nuclear and other industries.
Quality: chemical purity - not less than 99.98.
Isotopic purity is at least 99.95.

Offering you my batch of Selenium 74 for your customers or you can buy it from me, we are discussing the price.
The cost is below the market, I will give it for $ 20,000 per gram, the whole lot is sold.
Further prolongation is possible. Delivery to any country on request